1 /* ST Microelectronics IIS2DH 3-axis accelerometer driver 2 * 3 * Copyright (c) 2020 STMicroelectronics 4 * 5 * SPDX-License-Identifier: Apache-2.0 6 * 7 * Datasheet: 8 * https://www.st.com/resource/en/datasheet/iis2dh.pdf 9 */ 10 11 #ifndef ZEPHYR_DRIVERS_SENSOR_IIS2DH_IIS2DH_H_ 12 #define ZEPHYR_DRIVERS_SENSOR_IIS2DH_IIS2DH_H_ 13 14 #include <zephyr/drivers/i2c.h> 15 #include <zephyr/drivers/spi.h> 16 #include <zephyr/drivers/gpio.h> 17 #include <zephyr/sys/util.h> 18 #include <zephyr/drivers/sensor.h> 19 #include <zephyr/kernel.h> 20 #include <stmemsc.h> 21 #include "iis2dh_reg.h" 22 23 /* 24 * Return ODR reg value based on data rate set 25 */ 26 #define IIS2DH_ODR_TO_REG_HR(_lp, _odr) \ 27 ((_odr == 0) ? IIS2DH_POWER_DOWN : \ 28 ((_odr < 10) ? IIS2DH_ODR_1Hz : \ 29 ((_odr < 25) ? IIS2DH_ODR_10Hz : \ 30 ((_lp == IIS2DH_LP_8bit) && (_odr >= 5376) ? IIS2DH_ODR_5kHz376_LP_1kHz344_NM_HP : \ 31 ((_lp != IIS2DH_LP_8bit) && (_odr >= 1344) ? IIS2DH_ODR_5kHz376_LP_1kHz344_NM_HP : \ 32 ((_lp == IIS2DH_LP_8bit) && (_odr >= 1600) ? IIS2DH_ODR_1kHz620_LP : \ 33 ((_lp != IIS2DH_LP_8bit) && (_odr >= 800) ? IIS2DH_ODR_400Hz : \ 34 ((31 - __builtin_clz(_odr / 25))) + 3))))))) 35 36 /* FS reg value from Full Scale */ 37 #define IIS2DH_FS_TO_REG(_fs) (30 - __builtin_clz(_fs)) 38 39 /** 40 * struct iis2dh_device_config - iis2dh hw configuration 41 * @spi: SPI bus spec. 42 * @i2c: I2C bus spec. 43 * @pm: Power mode (lis2dh_powermode). 44 * @int_gpio: GPIO spec for sensor pin interrupt. 45 */ 46 struct iis2dh_device_config { 47 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) 48 struct spi_dt_spec spi; 49 #endif 50 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c) 51 struct i2c_dt_spec i2c; 52 #endif 53 uint8_t pm; 54 #ifdef CONFIG_IIS2DH_TRIGGER 55 struct gpio_dt_spec int_gpio; 56 #endif /* CONFIG_IIS2DH_TRIGGER */ 57 }; 58 59 /* sensor data */ 60 struct iis2dh_data { 61 int16_t acc[3]; 62 uint32_t gain; 63 64 stmdev_ctx_t *ctx; 65 #ifdef CONFIG_IIS2DH_TRIGGER 66 const struct device *dev; 67 struct gpio_callback gpio_cb; 68 sensor_trigger_handler_t drdy_handler; 69 const struct sensor_trigger *drdy_trig; 70 #if defined(CONFIG_IIS2DH_TRIGGER_OWN_THREAD) 71 K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_IIS2DH_THREAD_STACK_SIZE); 72 struct k_thread thread; 73 struct k_sem gpio_sem; 74 #elif defined(CONFIG_IIS2DH_TRIGGER_GLOBAL_THREAD) 75 struct k_work work; 76 #endif /* CONFIG_IIS2DH_TRIGGER_GLOBAL_THREAD */ 77 #endif /* CONFIG_IIS2DH_TRIGGER */ 78 }; 79 80 int iis2dh_i2c_init(const struct device *dev); 81 int iis2dh_spi_init(const struct device *dev); 82 83 #ifdef CONFIG_IIS2DH_TRIGGER 84 int iis2dh_init_interrupt(const struct device *dev); 85 int iis2dh_trigger_set(const struct device *dev, 86 const struct sensor_trigger *trig, 87 sensor_trigger_handler_t handler); 88 #endif /* CONFIG_IIS2DH_TRIGGER */ 89 90 #endif /* ZEPHYR_DRIVERS_SENSOR_IIS2DH_IIS2DH_H_ */ 91
